JPH0247338A - Weft treatment of weaving machine of fluid jet type - Google Patents

Abstract

PURPOSE:To simply treat weft by a simple structure by setting a weft pulling device in a mechanically stationary state between a yarn feeding member and a weft storage device. CONSTITUTION:When a picking mistake is detected, cutting of weft by a weft cutter 14 is stopped, operation of weaving machine is suspended, the weaving machine is reversely operated, mistaken yarn Wa is exposed to a position before weaving. Weft containing the mistaken yarn is sent to a weft storage device 10 by a weft pulling device 17 and removed. The weft is threaded from a weft pulling position throught the weft storage device to a picking main nozzle by jetting flow from a weft threading nozzle 19 and by suction force at an inlet of a main nozzle 11.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applied to a weft insertion process of a fluid jet loom, in which, for example, the flying tip of a weft running on the jet stream of a weft insertion nozzle arrives at the opposite side of the weft insertion. The present invention relates to a weft processing method for eliminating weft insertion errors when they occur.

BACKGROUND OF THE INVENTION Among this type of weft processing methods, for example, Japanese Patent Application Laid-Open No. 59-2
There is one shown in Japanese Patent No. 28047.

This is to remove misplaced yarns through the following steps (1) to (2).

■Detects a weft insertion error in which the flying tip of the weft thread does not arrive at the opposite side of the weft insertion.

■Cancel the weft cutting function.

■Stop the loom operation.

■The loom is operated in reverse to expose the missed yarn connected to the main weft insertion nozzle on the loom.

■The weft separator takes out the misplaced yarns from the warp opening to the weft insertion side.

■The erroneous yarn taken out on the weft insertion side is suctioned by a suction nozzle that is moved between the main weft insertion nozzle and the warp yarns.

■ Cut the weft yarn between the suction nozzle and the weft insertion nozzle to remove the misplaced yarn.

Problems to be Solved by the Invention As is clear from the steps of ■ to ■, the weft separation device is reciprocated in the cloth width direction within the warp opening, and the suction nozzle is moved from the retracted position to the main weft insertion nozzle and the warp. The structure is large-scale because it has to be moved between locations, and the installation of equipment around the main weft insertion nozzle is also complicated.

Measures to solve the problem When detecting a wrong yarn, first the weft cutting function is stopped and the loom is stopped, and then the loom is operated in reverse to expose the wrong yarn connected to the weft insertion nozzle in front of the weave. A weft pulling device provided between the weft storage device and the yarn supplying body removes the weft yarn including the miss yarn through the weft storage device.

Example As shown in Figure 1, this weft processing method is roughly as follows: ■Detect weft insertion errors.

■Cancel the weft cutting function.

■Stop the loom operation.

■The loom is operated in reverse to expose the missed yarn connected to the main weft insertion nozzle at the front of the weave.

(2) A weft pulling device provided between the weft storage device and the yarn supplying body removes weft yarns including misplaced yarns via the weft storage device.

■The weft thread is threaded from the weft traction device to the weft insertion main nozzle via the weft storage device using the jet flow from the weft passing nozzle provided on the entrance side of the weft traction device and the suction force at the entrance of the weft insertion main nozzle.

It consists of each process.

Here, each of the steps (1) to (2) above will be explained in detail with reference to FIGS. 2 to 5.

Regarding process (2), during the weaving operation of the loom, the winding of the weft storage device 10 is determined at a predetermined detection time by the warp sensor 1 installed at the entrance side of the arm loa, and the warp sensor 2 installed at the entrance side of the weft insertion main nozzle 11. ．． A warp sensor 3 installed on the exit side of the weft insertion main nozzle 11 3 A no-yarn signal is output from any one of the warp sensors 4 installed on the side opposite to the weft insertion main nozzle of the reed (not shown), or a body cut yarn traction device The body breakage signal (thread presence signal of the body breakage sensor 5) is manually inputted from the body breakage sensor 5 provided on the entrance side of the weft 12 to the control function unit I3, and the control function unit 13 detects a weft insertion error (as shown in Fig. 2). (see section S2).

Regarding the step (2), upon detection of a weft insertion error, the control function unit 13 stops the scissor cutting movement of the loom's regular cutter 14 for cutting the weft W to a predetermined weft insertion length, that is, the weft cutting function of the loom (see Fig. 2). (see section S2).

Regarding the step (2), in response to a control command from the control function unit 13, the normal rotation of the main shaft of the loom (not shown), that is, the weaving rotation is stopped, and the operation of the loom is stopped (see section S3 in FIG. 2). The rotation of the loom main shaft is normally stopped at the next weaving cycle after the one in which the erroneous thread Wa was detected, in order to reduce the shock of the power transmission mechanism to each of the reeds and belts.

Regarding the process (a), after a time delay from the detection of the above-mentioned erroneous thread Wa until the operation of the loom completely stops, the main shaft of the loom starts rotating in reverse at a speed slower than normal rotation according to a control command from the control function section 13 ( (See section S4 in Figure 2).

(b) Then, during the weaving cycle in which the error yarn Wa occurred, when the reed is in the retreat position and the warp (not shown) is at its maximum opening, the reversal of the loom main shaft is stopped by a control command from the control function unit 13 ( (See section S5 in Figure 2).

By reversing the loom main shaft by these (a) and (b),
The upper and lower warp threads alternate, and the weft insertion main nozzle 1
The miss yarn Wa connected to No. 1 is exposed at the front of the weave.

Regarding the process (2), the control function unit 13 searches for the cut point of the mis-threaded yarn Wa, that is, the weft W, and selects a process suitable for the occurrence state of the mis-threaded yarn Wa;
Execute. This will be explained according to the flowchart of FIG. 2. First, as shown in sections 86 to SIO, the presence or absence of a weft is checked by each of the weft sensors 1 to 4 and the body breakage sensor 5. (a) When there is no yarn in section S6, the yarn is broken on the yarn supplying body 15 side, so the weft W is removed from the yarn supplying body 15 by the yarn breakage process on the yarn supplying body side as shown in section S11. Tensa 16. Weft traction device 17. The yarn is inserted through the weft storage device 10 to the weft insertion main nozzle 11, and the weaving operation of the loom is restarted.

(b) When sections 86 to S9 have yarn and section SIO has no yarn, the loom has stopped due to a reason other than the occurrence of an error thread. Therefore, as shown in section S12, the cause of the stoppage must be resolved before the loom starts weaving. Resume driving.

(c) Section S6. When S7 has yarn and section S8 has no yarn, there is no weft W on the exit side of the weft inserting main nozzle 11, so there is a so-called blown-out state, so the body cut sensor 5 detects the weft as shown in sector 9 S13. Considering the results, when this section S13 has yarn, there is a body cut yarn wb, so after driving the body cut yarn traction device 12 to remove the body cut yarn wb as shown in section S14, the loom Weaving operation resumes.

(d) Section S6. S7 has thread and is sexy/=J
N S8. When S13 or no thread, or section S
When section 6 has yarn and section S7 has no yarn, first, section S15 tightly grips the weft yarn tensioner 16 to prevent the weft yarn W from being let out from the yarn supplying body 15, and then, as shown in section 816, The weft traction device 17 starts removing the missed yarn, that is, the /guru 1 of the weft traction device 17
Air is injected from the weft thread guiding hole 17 of the weft pulling device 17.
Blow the weft yarn W in b from the side (see arrow X in Figure 4). And in section S17, the wrapping is on arm IOa.
is reversed, and the weft W wound around the drum 10b of the weft storage device 10 is removed.

Then, as the weft W tightly gripped by the weft tensioner 16 is unwound from the drum 10b, a jet flow within the weft pulling device 17 causes the weft W to be tightly gripped by the weft tensioner 16, and the vibrator 17c facing the nozzle 17a is
(See Figure 4).

(e) Even when sections 86 to S8 have threads and section S9 has no threads, the weft tensioner 16 is strongly gripped at section S18 in the same manner as sections S15 to S17, and sector 9 is held at S19. As shown in , the weft traction device 17 starts to pick up the misplaced yarn, and in section S20, the winding arm 10a is reversed.As shown in section S21, the storage 1 sensor 6 searches for the storage amount of the weft storage device 10. When the storage amount reaches a predetermined amount of residue wrapped around the drum 10b two or three times, section S22
The length measuring type 10c of the weft storage device IO is released from the drum 10b, and the length measuring type sensor 7 is released as shown in section S23.
It is determined whether the length measuring die 10c has come out of the drum 1ob or not. In this case as well, the weft W tightly gripped by the weft tensioner 16 is blown into the vibrator 17c by the jet flow within the weft pulling device 17 as it is uncoiled from the drum IOb, as in the case of item (d) above.

) When sections S6 to SIO have yarn, the section 24 drives the body cutting yarn pulling device 12 to remove the body cutting yarn wb, and the sections 818 to S23 remove the weft yarn tightly gripped by the weft tensioner 16. As the W is unwound from the drum lOb, it is blown into the vibrator 17c by a jet flow within the weft pulling device 17.

(G) Top S (D) (E) (He) (Here, as shown in section S25, the miss yarn Wa in the weft sensor l is transferred from the weft insertion main nozzle 11. to the weft storage device lO to the weft traction device 17, and if the mistaken thread Wa is pulled and removed, the wrapping arm 10a is stopped from reversing in section S26, the width arm 10a is stopped at a fixed position, and the section Weft traction device 1 at S27
The power of 7, scissoring Yu 17d and moving the vibe 17d
By cutting the weft W containing the misplaced yarn Wa that is being pulled therein, and stopping the jetting from the nozzle 17a as shown in section S28, the weft pulling device 17 stops removing the misplaced yarn. As a result, the missed yarn Wa is removed from the weft yarn pulling device 17.
(See Figure 5).

Regarding the step (2), in this embodiment, after removing the misplaced yarn Wa, the weft W is automatically threaded from the weft traction device 17 through the weft storage device IO to the weft insertion main nozzle 11 to restart the weaving operation of the loom. be. This is the section S29~ shown in Figure 2.
It is executed in S39.

In other words, (a) the thread guide hole 1 of the weft traction device 17 in section S29;
Air is ejected from the weft passing nozzle 19 provided on the outside of the entrance of section S30 (see arrow Y in Fig. 6), and in section S30, the weft tensor 16 is alternately held in a weak grip state in which the weft W can be pulled out, or in a state in which the open 1 strong grip is repeated. Then, in section S31, the weft insertion main nozzle 11 is operated to eject. This jetting operation of the weft insertion main nozzle 11 is performed by jetting air from a first ejector nozzle llb for weft insertion provided at the rear end of the weft insertion main nozzle body 11a and a second ejector nozzle llb provided at the tip. , a suction force is generated at the entrance of the weft insertion main nozzle body 11a, and the section S32
The plurality of weft inserting sub-nozzles 20 are operated to eject. As a result, the weft W stretched from the yarn feeder 15 to the weft guide hole 17b of the weft pulling device 17 via the weft tensioner 16,
Riding on the jet flow from the weft passing nozzle 19, the thread guide hole 17b
The winding of the weft storage device 10 is blown through the arm 10a, and the winding is carried by the jet flow from the arm Oa toward the entrance of the weft insertion main nozzle body 11a. The weft insertion main nozzle body 11a reaches the vicinity and is taken into the weft insertion main nozzle body 11a by the suction force generated at the entrance of the weft insertion main nozzle body 11a. The jet stream from the weft inserter flies toward the anti-weft inserting main nozzle (see Figure 6).

(b) As shown in section S33, when the body breakage sensor 5 detects the presence of yarn due to the flight of the weft W, the section S
34, weft thread passing nozzle 19 and second ejector nozzle llb
and the first ejector nozzle lla.
The injection pressure is set to the weft insertion operating pressure during weaving operation, the weft tensioner 16 is set to a weak grip state in section S35, the length measuring type tOC is inserted into the drum tab in section S36, and the winding is performed in section S37. The arm lQa is rotated in the normal direction, and the storage amount sensor 6 detects the storage amount of the weft storage device 1O as shown in section S38. When the storage amount reaches a predetermined storage amount that is equal to or more than the weft insertion 1 pick, Section S
At step 39, the winding arm 10a stops rotating normally, and the weaving operation of the loom is restarted, completing the series of processing operations (see Figure 3).
.

The present invention is not limited to the above-mentioned embodiment, and as shown by the imaginary line in FIG. .

Section 541 (holds the missed yarn Wa with the gripper 17e shown in phantom lines in FIG. 3 of the weft pulling device 17), section 542 (wrapping involves rotating the arm 10a once in the normal direction),
Section 543 (opens the gripper 17e) and section 544 (reverses the arm IOa once for winding) are inserted, and the traction force by the jet flow of the weft traction device 17 and the winding of the arm 10a are Mistaken threads can also be removed by working together. As shown by the imaginary line in FIG. 3, a weft guide 21 having an ejector nozzle function is provided between the weft storage device IO and the weft insertion main nozzle 11, and the suction force generated at the entrance of this weft guide 21 and the It is also possible to wind the weft W with a jet stream and blow it through the weft insertion main nozzle 11 from the arm tOa through the weft guide 21.

In addition, in section S39, prior to restarting the weaving operation of the loom, the weft tip protruding from the tip of the weft inserting main nozzle 11 is cut by the cutter 22 shown by the phantom line in FIG. Alternatively, water, harmless gas, etc. can be used as the jet stream.

Although not shown, the weft traction device 17. The traction device such as the body cutting yarn traction device 12 may have a structure in which the weft W is drawn between a pair of rollers and pulled, or a structure in which the weft W is wound around a rod-shaped body and pulled.

Effects of the Invention As described above, according to the present invention, weft processing can be easily performed with a simple structure in which a weft pulling device is provided between a yarn supplying body and a weft storage device of a normal fluid jet loom. Moreover, the installation of equipment around the weft storage device is simple, which is advantageous in terms of maintenance.

Furthermore, with the weft pulling device mechanically stationary, it is possible to automatically and easily remove misplaced yarns connected to the weft insertion nozzle.

[Brief explanation of the drawing]

Fig. 1 is a process diagram showing an embodiment of the present invention, Fig. 2 is a flowchart of the embodiment, Fig. 3 is a schematic configuration diagram showing a fluid jet loom used in the embodiment, and Figs. 4 and 5. 6 is an explanatory diagram of the operation during the removal of a mistaken thread in the same embodiment, and FIG. 6 is an explanatory diagram of the operation during the weft thread threading of the same embodiment. 10... Weft storage device, 11... Weft insertion nozzle, 13
- Control function section, 14 - Regular cutter, 15... Yarn feeder, 17 - Weft traction device, W... Weft, Wa... Missed yarn,
wb...Body cutting thread. Figure 1

Claims (1)

[Claims] (1) When a misplaced yarn is detected, first the weft cutting function is stopped and the loom is stopped, and then the loom is operated in reverse to expose the misplaced yarn connected to the weft insertion nozzle on the weaving front, and the weft storage device 1. A weft processing method for a fluid jet loom, characterized in that the weft yarn containing the misplaced yarn is removed by a weft pulling device provided between the weft supplying body and the weft yarn storage device.